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  #1  
Old 01-02-2013, 11:51 PM
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New Member. New WJ has a tail light problem

Hi all,

I have owned my 2000 WJ for 3 days now. 4.0L. Went to change the tail light/brake light bulb (top) and nothing happened. So I pulled the assy off and Eureka! Looks like it got submerged while the lights were on, shorted and melted (it would have been the only bulb in use). Sound like a good diagnosis?

So my voltmeter ran off on me. Anybody know which pins in the connectors go to which tabs so I can bypass the housing until I can junk yard dive for a new one? Anything I should look for while I'm there?

Any other WJ advice will be greatly appreciated!

Pic: pin numbers I made up.
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Old 01-03-2013, 09:38 AM
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Re: New Member. New WJ has a tail light problem

I'm not sure about the by pass, but if you decide to replace check out Rock Auto.
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Old 01-03-2013, 09:54 AM
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WJ's make a habit of melting those sockets because the boards overheat... no water necessary. When you replace them you should do it with led tail lights.

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Old 01-03-2013, 10:18 AM
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Re: New Member. New WJ has a tail light problem

The problem also seems to be with the small tabs on the sockets, they make bad contact, which causes a low resistance, and the unit heats up locally and melts the plastic.
Unfortunately i can't send the connector pin-out from my work computer and my home computer just died on me yesterday night.
I can tell you which pin is for what, independent of LH or RH unit.
Seems that the numbering you gave to it is the right numbering.
1= back-up lamp feed
2= rear fog lamp relay output (export)
3= park lamp relay output
4= right turn signal
5= ground
6= primary brake switch signal

Not sure which pin is connected to which tab, just make a simple test circuit with a 1.5 V battery and a 1.5 V lamp and check which pin is connected to which tab.
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Old 01-03-2013, 01:31 PM
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Re: New Member. New WJ has a tail light problem

Quote:
Originally Posted by Frango100 View Post
The problem also seems to be with the small tabs on the sockets, they make bad contact, which causes a low resistance, and the unit heats up locally and melts the plastic.
Unfortunately i can't send the connector pin-out from my work computer and my home computer just died on me yesterday night.
I can tell you which pin is for what, independent of LH or RH unit.
Seems that the numbering you gave to it is the right numbering.
1= back-up lamp feed
2= rear fog lamp relay output (export)
3= park lamp relay output
4= right turn signal
5= ground
6= primary brake switch signal

Not sure which pin is connected to which tab, just make a simple test circuit with a 1.5 V battery and a 1.5 V lamp and check which pin is connected to which tab.
Thank you very much, that's all I need! Greatly appreciated! Went to the junkyard today and they had no WJ in the yard. They said it was because of the cash for clunkers program. Alright, I'll see if I can bypass this SOB.
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Old 01-03-2013, 10:10 PM
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Re: New Member. New WJ has a tail light problem

Thanks again for the help. I wrote a write up on the fix here... WJ 99-04 Tail light assembly - $.0.75 FIXED!
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Old 01-03-2013, 10:41 PM
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Good job on the write up ! And the fix !

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